An air tightness test fixture

Abstract

The utility model provides a kind of air tightness test tool, including support platform and positioning table, positioning table is elastically connected above support platform, positioning table is used to place hardware components, positioning table includes base, first sealing end cover and press plate, two groups of installation parts same structure are symmetrically equipped above base along left and right direction, single installation part is formed by the interval of several placement grooves same structure side by side, placement groove shape is matched with hardware component appearance, hardware component is L type structure, positioning column is vertically provided in placement groove;Air cock is installed on the outside of base, air cock is communicated to each positioning column in base to inflate, press plate is covered on base, and hardware component is positioned and pressed in placement groove.The utility model provides a kind of air tightness test tool, simple structure and with good sealing effect, simple and fast installation, can accommodate multiple hardware components simultaneously, realize batch testing, the sealing condition of all parts is consistent, and test result is more reliable.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, specifically an airtightness testing fixture. Background Technology

[0002] Hardware parts are often used as core components for fluid control and sealing protection. In order to avoid leakage of internal fluids or gases, air tightness testing is an important test item. For the hardware parts structure shown in Figures (1) and (2), the product has openings in two directions. Therefore, the openings need to be sealed before the air tightness test is conducted. Thus, it is necessary to design corresponding sealing test fixtures for auxiliary testing. Utility Model Content

[0003] The purpose of this invention is to provide an airtightness testing fixture to solve the technical problems in the background art.

[0004] To achieve the aforementioned objectives, this utility model provides the following technical solution:

[0005] An airtightness testing fixture includes a support platform and a positioning platform. The positioning platform is elastically connected above the support platform and is used to place hardware components. The positioning platform includes a base, a first sealing end cap, and a pressure plate. Two sets of identical mounting portions are symmetrically arranged on the upper part of the base along a left-right direction. Each set of mounting portions is formed by several identical placement slots spaced side-by-side. The shape of the placement slots matches the shape of the hardware components. The hardware components are L-shaped and include a main body and a first connecting post. The first connecting post is perpendicular to one side above the main body. The body has a first opening on the left side, and an external thread on the outside of the first opening. The first connecting post is a hollow cavity structure. The main body has a first insertion hole with an opening structure that communicates with the inner cavity of the first connecting post. A positioning post is vertically arranged in the placement groove. During testing, the first sealing end cap is threadedly installed and fixed to the first opening, and the positioning post is sealed and inserted into the first connecting post. An air nozzle is installed on the outside of the base. The air nozzle is connected to an air pump and leads to each positioning post in the base for inflation. The pressure plate cover presses on the base to position and press the hardware parts into the placement groove.

[0006] The end face of the base is also provided with a recessed clearance groove for placing the first sealing end cap. There are two clearance grooves between the two sets of mounting parts.

[0007] The positioning column includes a first column and a second column. The first column is above the second column and the first column and the second column are coaxially arranged. The diameter of the first column is larger than the diameter of the second column. A first sealing gasket is installed on the top of the second column and fits tightly against the inner sidewall of the first connecting column. The first column has a hollow cavity structure inside. A first air inlet is opened at the bottom of the first column. The base has a hollow first chamber. The first air inlet communicates with the first chamber. A first air outlet is provided on the top of the first column. The first air outlet communicates with the first air inlet. The first air outlet passes through the left and right ends of the first column.

[0008] The pressure plate includes a base plate, with a pressure block protruding upward from the center of the base plate. The base plate is provided with several placement holes corresponding to the placement slots, and the top surface of the pressure block is higher than the top surface of the positioning post.

[0009] An elastic sealing gasket is placed inside the first sealing end cap and fits tightly against the first opening.

[0010] The placement groove is provided with a second sealing gasket, which surrounds the periphery of the positioning post and is in contact with and fits against the bottom of the hardware component.

[0011] The support platform includes a fixed plate and guide columns. The fixed plate has a rectangular structure. There are four guide columns, located at the four corners of the fixed plate. Each guide column is fitted with a compression spring. The base has guide holes that connect to the guide columns. The compression springs are pressed between the base and the fixed plate.

[0012] Compared with the prior art, the airtightness testing fixture provided by this utility model has a simple structure and good sealing effect. It has no precision and complex components, is easy and quick to install, and can accommodate multiple L-shaped hardware parts at the same time to achieve batch testing. All parts have the same sealing conditions, and the test results are more reliable. Attached Figure Description

[0013] Figure 1 : A three-dimensional structural diagram of the product to be processed in this application;

[0014] Figure 2 : A half-sectional view of the product to be processed in this application;

[0015] Figure 3 : A three-dimensional structural diagram of this application;

[0016] Figure 4 : 3D structural diagram of the support platform;

[0017] Figure 5 : 3D structural diagram of the positioning platform;

[0018] Figure 6 Top view of the positioning platform;

[0019] Figure 7 Longitudinal half-section structural diagram of the positioning column;

[0020] Figure 8 : 3D structure diagram of the pressure plate;

[0021] Figure 9 : Diagram showing the placement of the product under test and its base;

[0022] Figure 10 : Schematic diagram of the installation structure of the positioning stage and the product under test. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Specific Implementation Example 1: Please refer to Figures 1 to 10 In this embodiment of the utility model, an airtightness testing fixture includes a support platform 1 and a positioning platform 2. The positioning platform 2 is elastically connected above the support platform 1 and is used to place a hardware component 6. The positioning platform 2 includes a base 3, a first sealing end cap 5, and a pressure plate 4. Two sets of identical mounting parts A are symmetrically arranged on the upper part of the base 3 along the left-right direction. Each set of mounting parts A is formed by several identical placement grooves 301 spaced side by side. The shape of the placement grooves 301 matches the shape of the hardware component 6. In this application, the hardware component 6 to be tested has an L-shaped structure. The hardware component 6 includes a main body 601 and a first connecting post 602. The first connecting post 602 is perpendicular to one side above the main body 601. A first opening 601-1 is opened on the left side of the main body 601. The opening 601-1 has an external thread on the outside. The first connecting post 602 is a hollow cavity structure. The main body 601 has a first insertion hole 601-2 with an opening structure that communicates with the inner cavity of the first connecting post 602. A positioning post 302 is vertically arranged in the placement groove 301. During the test operation, the first sealing end cap 5 is threadedly installed and fixed to the first opening 601-1. An elastic sealing gasket 501 is placed in the first sealing end cap 5 and fits tightly with the first opening 601-1. The positioning post 302 is sealed and inserted into the first connecting post 602. An air nozzle 304 is installed on the outside of the base 3. The air nozzle 304 is connected to an air pump and inflates each positioning post 302 in the base 3. The pressure plate 4 presses on the base 3 to position and press the hardware parts 6 into the placement groove 301.

[0025] The end face of the base 3 of this application is also provided with a recessed clearance groove 303 for placing the first sealing end cap 5. The clearance groove 303 is provided with two grooves and is located between the two sets of mounting parts A.

[0026] The positioning post 302 includes a first post 302-1 and a second post 302-2. The first post 302-1 is located above the second post 302-2, and the first post 302-1 and the second post 302-2 are coaxially arranged. The diameter of the first post 302-1 is larger than the diameter of the second post 302-2. A first sealing gasket 302-3 is installed above the second post 302-2 and fits tightly against the inner wall of the first connecting post 602. The first post 302-1 contains... The component has a hollow structure. The bottom of the first column 302-1 has a first air inlet 302-1-1. The base 3 has a hollow first chamber 305, and the first air inlet 302-1-1 communicates with the first chamber 305. A first air outlet 302-1-2 is located above the first column 302-1, communicating with the first air inlet 302-1-1. The first air outlet 302-1-2 extends through both ends of the first column 302-1. Air is vented through the first air outlet 302-1-2 to allow ventilation into the interior of the hardware component 6.

[0027] The pressure plate 4 includes a base plate 401. A pressure block 402 protrudes upward from the middle of the base plate 401. The base plate 401 is provided with a number of placement holes 401-1 that correspond to the positions of the placement grooves 301. The shape of the placement holes 401-1 also matches the shape of the hardware parts 6. The internal size of the placement holes 401-1 is smaller than the external size of the hardware parts 6, so that the outer edge of the placement holes 401-1 can be pressed and contacted, so that the hardware parts 6 to be tested can be positioned in the placement grooves 301. The top surface of the pressure block 402 is higher than the top surface of the positioning post 302.

[0028] A second sealing gasket 307 is provided in the placement groove 301. The second sealing gasket 307 surrounds the periphery of the positioning post 302 and is in contact with the bottom of the hardware component 6. When the test is performed, the pressure plate 4 is pressed on top of the hardware component 6. The second sealing gasket 307 makes a flexible contact between the bottom of the hardware component 6 and the bottom of the placement groove 301. That is, in this application, two sealing gaskets and one elastic sealing gasket are used to achieve elastic sealing between the three opening directions of the hardware component 6 and the base 3, so as to ensure the accuracy of its airtightness test.

[0029] The support platform 1 includes a fixed plate 101 and guide columns 102. The fixed plate 101 has a rectangular structure, and four guide columns 102 are located at the four corners of the fixed plate 101. Each guide column 102 is fitted with a compression spring 103. The base 3 has guide holes that connect with the guide columns 102, and the compression springs 103 are pressed between the base 3 and the fixed plate 101. The support platform 1, with its elastic structure, allows for quick reset of the positioning platform 2 after testing, facilitating the removal of products from the positioning platform 2 by operators.

[0030] Workflow: The testing fixture of this application can be used in a water tank or water trough. First, install the support platform 1 of this application at the bottom of the water tank of the test platform, fill the water tank with water, and the water level should be above the guide column 102 of the support platform 1. Then, insert the positioning platform 2 with the product placed on it into the support platform 1. Then, drive the pressing plate 4 downward through the external drive component to press the positioning platform 2 towards the bottom of the support platform 1. Then, inflate the inner cavity of the hardware component 6 from the base 3 of the positioning platform 2. Observe whether there are air bubbles in the water in the tank to determine the airtightness of the hardware component 6 to be tested.

[0031] Compared with the prior art, the airtightness testing fixture provided by this utility model has a simple structure and good sealing effect. It has no precision and complex components, is easy and quick to install, and can accommodate multiple L-shaped hardware parts at the same time to achieve batch testing. All parts have the same sealing conditions, and the test results are more reliable.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the foregoing exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An airtightness testing fixture, characterized in that: The system includes a support platform and a positioning platform. The positioning platform is elastically connected above the support platform and is used to place hardware components. The positioning platform includes a base, a first sealing end cap, and a pressure plate. Two sets of identical mounting portions are symmetrically arranged on the upper part of the base along a left-right direction. Each set of mounting portions consists of several identical placement slots spaced side-by-side. The shape of the placement slots matches the shape of the hardware components. The hardware components are L-shaped and include a main body and a first connecting post. The first connecting post is perpendicular to one side above the main body and on the left side of the main body. The system has a first opening with external threads on the outside. The first connecting post is a hollow cavity structure. The main body has a first insertion hole with an opening that communicates with the inner cavity of the first connecting post. A positioning post is vertically arranged in the placement groove. During testing, the first sealing end cap is threadedly installed and fixed to the first opening, and the positioning post is sealed and inserted into the first connecting post. An air nozzle is installed on the outside of the base, and the air nozzle is connected to an air pump to inflate each positioning post in the base. The pressure plate cover presses on the base to position and press the hardware parts into the placement groove.

2. The airtightness testing fixture according to claim 1, characterized in that: The end face of the base is also provided with a recessed clearance groove for placing the first sealing end cap. There are two clearance grooves between the two sets of mounting parts.

3. The airtightness testing fixture according to claim 2, characterized in that: The positioning column includes a first column and a second column. The first column is above the second column and the first column and the second column are coaxially arranged. The diameter of the first column is larger than the diameter of the second column. A first sealing gasket is installed on the top of the second column and fits tightly against the inner sidewall of the first connecting column. The first column has a hollow cavity structure inside. A first air inlet is opened at the bottom of the first column. The base has a hollow first chamber. The first air inlet communicates with the first chamber. A first air outlet is provided on the top of the first column. The first air outlet communicates with the first air inlet. The first air outlet passes through the left and right ends of the first column.

4. The airtightness testing fixture according to claim 3, characterized in that: The pressure plate includes a base plate, with a pressure block protruding upward from the center of the base plate. The base plate is provided with several placement holes corresponding to the placement slots, and the top surface of the pressure block is higher than the top surface of the positioning post.

5. The airtightness testing fixture according to claim 4, characterized in that: An elastic sealing gasket is placed inside the first sealing end cap and fits tightly against the first opening.

6. The airtightness testing fixture according to claim 5, characterized in that: The placement groove is provided with a second sealing gasket, which surrounds the periphery of the positioning post and is in contact with and fits against the bottom of the hardware component.

7. The airtightness testing fixture according to claim 6, characterized in that: The support platform includes a fixed plate and guide columns. The fixed plate has a rectangular structure. There are four guide columns, located at the four corners of the fixed plate. Each guide column is fitted with a compression spring. The base has guide holes that connect to the guide columns. The compression springs are pressed between the base and the fixed plate.

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